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Orderable Name C5B9 SC5b-9 Level Terminal Complement Complex, Plasma


Specimen Required


Patient Preparation:

1. Fasting preferred.

2. Do not collect a specimen for the 48 hours following a plasma exchange.

Collection Container/Tube: Light-blue top (3.2% sodium citrate)

Submission Container/Tube: Plastic vial

Specimen Volume: 1.5 mL

Collection Instructions:

1. Immediately after specimen collection, place the tube on wet ice.

2. Centrifuge between 1000-2000 x g for 10 minutes at 4° C and aliquot plasma into plastic vial.

3. Freeze specimen within 30 minutes.


Useful For

Detecting increased complement activation

Method Name

Enzyme-Linked Immunosorbent Assay (ELISA)

Specimen Type

Plasma Na Cit

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Plasma Na Cit Frozen 14 days

Reject Due To

Gross hemolysis OK
Gross lipemia Reject
Gross icterus OK

Reference Values

≤250 ng/mL

Day(s) Performed

Tuesday, Friday

Report Available

3 to 5 days

CPT Code Information

86160